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P. A. NEPILLY. FIRE BOX FOR LOCOMOTIVS.

No. 261.474. Patented July 18. 1882.

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I UNITED STATES PATENT OFFICE.

PAUL AUGUST NEPILLY, OF SAARBRGKEN, GERMANY.

FIRE-BOX FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 261,474, dated July 18, 1882.

Application filed March 7, 1882. (No model.) Patenti-.din Germany .Tuiy 23, iseo, No. 12,855, and Api-ii 23, 1881, No. 15,597, in Austria-Hungary February 18, 1881, No. 40,571 and No. 5,019; in France December 20, 1881; in Belgium December 22', 1881, and in Italy January 3, 1882, No. 13,762.

To all whom it may concern:

Be it known that I, PAUL AUGUST N EPILLY, engineer of the Royal Prussian State Railway,

in Saarbrcken, German Empire, haveinvented a part of this specification.

ln locomotive-furnaces as at presentconstructed the lighter part of the fuel or coal cleaning. Moreover, the walls ot' the furnace are thereby heated to a considerable extent and cause damage which may put the locomotive out of working order.

I have devised a construction of furnaces which, while obviating the above-mentioned inconveniences, will allow of a more powerful draft by a greater admission of air, producing a more complete combustion of the fuel, and tending at the same time to increase the amount of heat emitted in the furnace. It consists in the special arrangement of an improved lire-screen, conjointly with an arrangement of fire-grates.

In orderthatmy'improvements may he clearly understood and readily put into practice, I will describe them in detail conjointly with the four figures of the three accompanying drawings, in which- Figure l is a longitudinal section of a locomotive-furnace to which my improvements are applied, and Fig. 2 a section of Fig. 1 through the line AA. Fig. 3 is a longitudinal section of a furnace wherein the said improvements are modified; and Fig. 4 is a cross-section of Fig. 3 through the line B B. l

In the main arrangement, shown in Figs. l and 2, lis a screen, made of fire-brick or other proof material.

lire-proof material, which is placed in an inclined position above a common fire-grate, 2. 3'is a grating for the inlet of air, and 4 is the door or opening for charging the furnace with fuel. i

5 is a movable lire-grate, which may be operated by the driver, for the removal of elinkers. It is conveniently secured to the framing ofthe furnace, and has at its lower parta downward-projecting arm, 6, which is connectedto a series of levers, the latter, 7, of which is placed on the drivers stand, where it may be operated according to the requirements. Upon falling the clinkers are received in the ash-pit, and are removed at any subsequent period through a suitable side door, (shown partly in dotted lines.) As will he seen in the transverse section, Fig.,2, the screen is composed ot' several blocks of fire-proof material, which preferably assume a vaulted form, with a smooth upper surface and rounded cross-ribs at their under surface, as 'shown in the drawings. These blocks may have angular projections instead of rounded ones at their under surface. The said screen may be set in any suitable manner in the lirebox upon suitably-formed wedges placed on each side, the walls of the tire-box being preferabl y inclined, so as to wedge the screen properly and safely when once set; or the screen may-be as broad as the inner width of the fireboX, and in such case it may rest upon a longitudinal bearing on each side, or upon one or more transverse bearings, made also of fire- In either case the screen bears with its lower inclined end against the back wall of the fire-box, below the tubes.

A modilioation of the above-described arrangement consists, as shown inFigs. 3 and 4-in the shape and constitution of the screen, as well as in the manner of securing the same, the rest of the parts being the same as previouslydescribed. Inthismodication'thescreen is composed of rollers 8, made ot' lire-proof material, resting at their lower ends upon the continuation of the grate 3 for the inlet of air.

9 is a transverse pipe, made of iron or other heat-resisting metal,which is open at each end,

and secured water-tight into the Walls ot' the tire-box, so :is to allow the water in the boiler to circulate through this pipe, thus affording u relatively larger increase ot surface for the heating of the Water, While serving at the suine time to support the tire-proof screen. In this latter arrangement greater facility is obtained for exchanging the rollers constituting the screen whenever it; may be needed.

The vertical grate can be used in stationary boilers with the suine advantage as in locomotive-boilers.

I claim as my inventionl. A boiler-furnace having a tire-screen of tire-proofmuterial made With aiseries ofrounded ribs at its under surface, an inclined grate, and

a rear vertical grate, 3, substantially as and for the purposes set forth.

2. A boiler-furnace having a tire-screen of lire-proot'muterial, and with a series ofrounded libs ai; its under surface, an inclined` grate, a rear vertical grate, and a dumping-grate, substantially :is shown and described.

3. Aboiler-t'urnace having a fire-screen with a series ot' rounded ribs on its under surface, :t main grate, a rear vertical grate, 3, a dumpingigrate, and a horizontal coking-grute, sul)- stantiully as shown and described.

PAUL AUGUST NEPILLY.

Witnesses:

L. WEBER, G. NEINEIPLY. 

